http://www.jegs.com/i/Eibach/369/E30510180122/10002/-1#qaTab Says they are listed for 2016-2018 Trailhawk. Anybody know why they wouldn't be able to fit on a 2015? As far as I know there aren't any changes between 2015 and 2016-2018 models in this area.
According to Tire Rack, the pro lift Springs that fit my 2016 75th also fit your 2015 Trailhawk. Same part number.